Madison County Demographics

A map of Madison County's Population by Race

Madison County, Iowa had a population of 16,548 in 2020. It was 93.7% White, 0.3% Black, 0.5% Asian, 1.9% Hispanic, 0.5% Native American/Other, and 3.1% Multiracial. This map presents the population of Madison County, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

Madison County is the 45th most populous county of the 99 counties in Iowa.

Madison County's White Population

15,504 residents of Madison County identify as White, or 93.7%. This makes the White share of the population of Madison County slightly larger than the White share of the population of Iowa (82.7% White). Of the 99 counties in Iowa, Madison County is ranked #25 in terms of White residents as a share of the population.

Madison County is more White than neighboring Dallas County (82% White), Union County (92.5% White), Clarke County (80.4% White), and Warren County (91.4% White). Madison County is less White than neighboring Adair County (94.3% White).

Madison County's Black Population

44 residents of Madison County identify as Black, or 0.3%. This makes the Black share of the population of Madison County roughly similar to the Black share of the population of Iowa (4.1% Black). Of the 99 counties in Iowa, Madison County is ranked #85 in terms of Black residents as a share of the population.

Madison County is less Black than neighboring Dallas County (2.7% Black), Union County (0.9% Black), Clarke County (0.4% Black), Warren County (0.9% Black), and Adair County (0.6% Black).

Madison County's Asian Population

83 residents of Madison County identify as Asian, or 0.5%. This makes the Asian share of the population of Madison County roughly similar to the Asian share of the population of Iowa (2.4% Asian). Of the 99 counties in Iowa, Madison County is ranked #45 in terms of Asian residents as a share of the population.

Madison County is more Asian than neighboring Adair County (0.3% Asian). Madison County is less Asian than neighboring Dallas County (5% Asian), Clarke County (0.8% Asian), and Warren County (0.7% Asian).

Madison County's Hispanic Population

316 residents of Madison County identify as Hispanic, or 1.9%. This makes the Hispanic share of the population of Madison County roughly similar to the Hispanic share of the population of Iowa (6.8% Hispanic). Of the 99 counties in Iowa, Madison County is ranked #84 in terms of Hispanic residents as a share of the population.

Madison County is less Hispanic than neighboring Dallas County (6.5% Hispanic), Union County (3.3% Hispanic), Clarke County (15.7% Hispanic), Warren County (3.2% Hispanic), and Adair County (2.5% Hispanic).

Madison County's Native American/Other Population

81 residents of Madison County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 0.5%. This makes the Native American/Other share of the population of Madison County roughly similar to the Native American/Other share of the population of Iowa (0.7% Native American/Other). Of the 99 counties in Iowa, Madison County is ranked #47 in terms of Native American/Other residents as a share of the population.

Madison County is more Native American/Other than neighboring Union County (0.3% Native American/Other), and Adair County (0.3% Native American/Other). Madison County is less Native American/Other than neighboring Clarke County (0.8% Native American/Other).

Madison County's Multiracial Population

520 residents of Madison County identify as Multiracial, or 3.1%. This makes the Multiracial share of the population of Madison County roughly similar to the Multiracial share of the population of Iowa (3.4% Multiracial). Of the 99 counties in Iowa, Madison County is ranked #23 in terms of Multiracial residents as a share of the population.

Madison County is more Multiracial than neighboring Union County (2.4% Multiracial), Clarke County (1.8% Multiracial), and Adair County (2.1% Multiracial). Madison County is less Multiracial than neighboring Dallas County (3.3% Multiracial), and Warren County (3.3% Multiracial).

Source: 2020 Census State Redistricting Data and Census TIGER/Line Shapefiles.